Research methods and statistics /
Sullivan, Kerry.
Gilbert, David.
Harlow : Pearson,
2004.
"Compiled from Statistics for economics, accounting and business studies 3rd edition by Mike Barrow, A guide to computing statistics with SPSS 11 for Windows revised edition by Dennis Howitt and Duncan Cramer, Marketing research: an applied approach 2nd European edition by Naresh K. Malhotra and David F. Birks."